#include <iostream>

using namespace std;

namespace HQYJ_2408
{
    int id;
    namespace xiaomei
    {
        int id;
    }
    namespace xiaoshuai
    {
        int id;
    }
    namespace feiyangyang
    {
        int id;
    }
}

using namespace HQYJ_2408;

int main(int argc, char const *argv[])
{
    id = 90;
    cout << "id = " << id << endl;

    xiaomei::id = 91;
    xiaoshuai::id = 92;
    feiyangyang::id = 93;

    cout << "id = " << id << endl;

    cout << "xiaomei::id = " << xiaomei::id << endl;
    cout << "xiaoshuai::id = " << xiaoshuai::id << endl;
    cout << "feiyangyang::id = " << feiyangyang::id << endl;

    return 0;
}
